Crystal structure of the superantigen staphylococcal enterotoxin type A.Schad, E.M., Zaitseva, I., Zaitsev, V.N., Dohlsten, M., Kalland, T., Schlievert, P.M., Ohlendorf, D.H., Svensson, L.A.
(1995) EMBO J. 14: 3292-3301
- PubMed: 7628431
- PubMed Abstract:
- Three-Dimensional Structure of a Human Class II Histocompatibility Molecule Complexed with Superantigen
Jardetzky, T.S.,Brown, J.H.,Gorga, J.C.,Stern, L.J.,Urban, R.G.,Chi, Y.I.,Stauffacher, C.,Strominger, J.L.,Wiley, D.C.
(1994) Nature 368: 711
- Structure of Toxic Shock Syndrome Toxin 1
Prasad, G.S.,Earhart, C.A.,Murray, D.L.,Novick, R.P.,Schlievert, P.M.,Ohlendorf, D.H.
(1993) Biochemistry 32: 13761
- Characterization of Two Distinct Mhc Class II Binding Sites in the Superantigen Staphylococcal Enterotoxin A
Abrahmsen, L.,Dohlsten, M.,Segren, S.,Bjork, P.,Jonsson, E.,Kalland, T.
(1995) Embo J. 14: 2978
- Zinc Regulates the Function of Two Superantigens
Fraser, J.D.,Urban, R.G.,Strominger, J.L.,Robinson, H.
(1992) Proc.Natl.Acad.Sci.USA 89: 5507
- Crystal Structure of Staphylococcal Enterotoxin B, a Superantigen
Swaminathan, S.,Furey, W.,Pletcher, J.,Sax, M.
(1992) Nature 359: 801
Staphylococcal enterotoxins are prototype superantigens characterized by their ability to bind to major histocompatibility complex (MHC) class II molecules and subsequently activate a large fraction of T-lymphocytes. The crystal structure of staphylo ...
Staphylococcal enterotoxins are prototype superantigens characterized by their ability to bind to major histocompatibility complex (MHC) class II molecules and subsequently activate a large fraction of T-lymphocytes. The crystal structure of staphylococcal enterotoxin type A (SEA), a 27 kDa monomeric protein, was determined to 1.9 A resolution with an R-factor of 19.9% by multiple isomorphous replacement. SEA is a two domain protein composed of a beta-barrel and a beta-grasp motif demonstrating the same general structure as staphylococcal enterotoxins SEB and TSST-1. Unique for SEA, however, is a Zn2+ coordination site involved in MHC class II binding. Four amino acids including Ser1, His187, His225 and Asp227 were found to be involved in direct coordination of the metal ion. SEA is the first Zn2+ binding enterotoxin that has been structurally determined.
Molecular Biophysics, Chemical Centre, Lund University.